Any doctors in the house?
I've been having strange aching pains lately that I can't pinpoint. It seems like it's partially in my sinus (behind the eye / temple), but also my gums are quite sore and painful at the same time. It's all on one side. It's almost like everything on the whole right side of my my face is just aching. I've had sinus problems before, but never any that involved gum tenderness or pain.
I'm not a doctor, just an asshole with an opinion on everything.
Sounds like a bitch of a sinus infection or an abscessed tooth.
I'd try a something over the counter with pseudoephedrine in it, like Mucinex D. Ask someone at the pharmacy for it. You'll have to show your driver's licenses for it.
If your face starts swelling get to a dentist.
Take that for what it's worth. I'm an engineer, not a doctor.